Touch panel and touch display panel

ABSTRACT

A touch panel and a touch display panel are provided. The touch panel includes a substrate on which a touch layer and a color filter layer are disposed. The touch layer includes touch electrodes, signal lines, and a shielding layer. Each signal line is electrically connected only to one touch electrode. The touch display panel includes an array substrate, a color filter substrate having a touch area and a non-touch area, and a liquid crystal layer. The color filter substrate includes touch electrodes, signal lines, color filter patterns, and a shielding layer which has transparent areas. The touch electrodes are disposed in the touch area and above the shielding layer. The signal lines are disposed above the shielding layer. Each signal line is connected only to one touch electrode. The color filter patterns are disposed above the touch electrode and correspond to the transparent areas of the shielding layer.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority benefit of Taiwan applicationserial no. 97144760, filed on Nov. 19, 2008. The entirety of theabove-mentioned patent application is hereby incorporated by referenceherein and made a part of specification.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to a panel structure, and moreparticularly, to a touch panel and a touch display panel.

2. Description of Related Art

In current information era, human beings by degrees tend to rely onelectronic products. The electronic products such as mobile phones,handheld personal computers (PCs), personal digital assistants (PDAs)and smart phones have pervaded everywhere in our daily life. To meetcurrent demands on portable, compact, and user-friendly informationtechnology (IT) products, touch panels have been introduced as inputdevices in replacement of conventional keyboards or mice. Among thetouch panels, a touch display panel capable of performing both a touchfunction and a display function is one of the most popular products atpresent.

FIG. 1 is a schematic partial cross-sectional view of a conventionaladded-type touch display panel. Referring to FIG. 1A, the touch displaypanel 100 includes a display panel 110, a touch panel 120, and anoptical adhesive 130 for adhering the display panel 110 to the touchpanel 120. Here, the display panel 110 is a liquid crystal display (LCD)which is able to achieve a multi-color display effect. The LCD includesan array substrate 112, a liquid crystal layer 114, and a color filtersubstrate 116. The touch panel 120 is a capacitance touch panel andincludes a substrate 122, a plurality of lower electrodes 124, adielectric layer 126, and an upper electrode 128. When a user pressesthe touch panel 120, the capacitance value between the upper electrode128 and the lower electrodes 124 is changed, and thereby frames orimages displayed on the display panel 110 can be further changed basedon the user's choices.

Nonetheless, the thickness of the added-type touch display panel is notlikely to be reduced, and therefore an integrated-type touch displaypanel has been proposed. FIG. 1B is a schematic partial cross-sectionalview of a conventional integrated-type touch display panel. Referring toFIG. 1B, the integrated-type touch display panel 100 a includes an arraysubstrate 112, a liquid crystal layer 114, an electrode layer 140, acolor filter layer 142, a touch layer 144, and a substrate 148. Thetouch layer 144 includes a plurality of touch electrodes 146 and aplurality of signal lines (not shown) which are connected to the touchelectrodes 146. In general, the touch electrodes are distributed into adisplay area of the entire touch display panel, and one signal line isconnected to a plurality of touch electrodes. As such, the excessivetouch electrodes result in excessive parasitic capacitance, therebynegatively affecting sensitivity of the touch display panel. Moreover,the layout of the touch electrodes complicates the manufacturing processof the touch display panel, therefore reducing yield thereof.

SUMMARY OF THE INVENTION

The present invention is directed to a touch display panel equipped withtouch electrodes and signal lines.

The present invention is further directed to a touch panel capable ofperforming both a touch function and a color filtering function.

In the present invention, a touch display panel including an arraysubstrate, a color filter substrate, and a liquid crystal layer isprovided. The color filter substrate is disposed opposite to the arraysubstrate and has a touch area and a non-touch area. Besides, the colorfilter substrate includes a shielding layer, a plurality of touchelectrodes, a plurality of signal lines, and a plurality of color filterpatterns. The shielding layer has a plurality of transparent areas. Thetouch electrodes are disposed in the touch area and above the shieldinglayer. The signal lines are disposed above the shielding layer, and eachof the signal lines is connected to only one of the touch electrodes.The color filter patterns are disposed above the touch electrodes andcorrespond to the transparent areas of the shielding layer. The liquidcrystal layer is sandwiched between the array substrate and the colorfilter substrate.

In an embodiment of the present invention, the touch electrodes includea plurality of first touch electrodes and a plurality of second touchelectrodes. The signal lines include a plurality of first signal linesand a plurality of second signal lines. Each of the first signal linesis connected to only one of the first touch electrodes and extends alonga first direction, and each of the second signal lines is connected toonly one of the second touch electrodes and extends along a seconddirection.

In an embodiment of the present invention, the first direction isdifferent from the second direction.

In an embodiment of the present invention, a material of the touchelectrodes is a transparent conductive material.

In the present invention, a touch display panel including an arraysubstrate, a color filter substrate, and a liquid crystal layersandwiched between the array substrate and the color filter substrate isprovided. The color filter substrate is disposed opposite to the arraysubstrate and has a touch area and a non-touch area. Besides, the colorfilter substrate includes a plurality of touch electrodes, a pluralityof signal lines, a shielding layer, and a plurality of color filterpatterns. The touch electrodes are disposed in the touch area, and eachof the touch electrodes has a plurality of transparent areas. Each ofthe signal lines is electrically connected only to only one of the touchelectrodes. The shielding layer is disposed corresponding to gaps amongthe touch electrodes. The color filter patterns are disposed above thetouch electrodes and the shielding layer and correspond to thetransparent areas of the touch electrodes.

In an embodiment of the present invention, the touch electrodes includea plurality of first touch electrodes and a plurality of second touchelectrodes. The signal lines include a plurality of first signal linesand a plurality of second signal lines. Each of the first signal linesis connected to only one of the first touch electrodes and extends alonga first direction, and each of the second signal lines is connected toonly one of the second touch electrodes and extends along a seconddirection.

In an embodiment of the present invention, a material of the transparentareas is a transparent conductive material.

In the present invention, a touch panel including a substrate, a touchlayer, and a color filter layer is provided. The touch layer is disposedon the substrate and includes a first touch electrode, a first signalline, and a shielding layer. The first signal line is electricallyconnected only to the first touch electrode. The color filter layer isdisposed on the substrate.

In an embodiment of the present invention, the first touch electrode hasa non-transparent area and a transparent area.

In an embodiment of the present invention, the touch layer furtherincludes a first insulating layer disposed on the substrate.

In an embodiment of the present invention, the first insulating layer isdisposed between the first touch electrode and the shielding layer.

In an embodiment of the present invention, the first insulating layer isdisposed between the first touch electrode and the color filter layer.

In an embodiment of the present invention, the first insulating layer isdisposed between the shielding layer and the color filter layer.

In an embodiment of the present invention, the touch layer furtherincludes a second touch electrode and a second signal line, and thesecond signal line is electrically connected only to the second touchelectrode.

In an embodiment of the present invention, the second touch electrodehas a non-transparent area and a transparent area.

In an embodiment of the present invention, the touch layer furtherincludes a second insulating layer disposed on the substrate.

In an embodiment of the present invention, the second insulating layeris disposed between the second touch electrode and the first touchelectrode.

In an embodiment of the present invention, the second insulating layeris disposed between the second touch electrode and the shielding layer.

In an embodiment of the present invention, the second insulating layeris disposed between the second touch electrode and the color filterlayer.

In an embodiment of the present invention, the first signal line isparallel to the second signal line.

In an embodiment of the present invention, a primary gap exists betweenthe first touch electrode and the second touch electrode.

In an embodiment of the present invention, the shielding layer includesa primary shielding area corresponding to the primary gap.

In an embodiment of the present invention, the color filter layerincludes a plurality of color filter patterns, and a secondary gapexists between every two of the color filter patterns.

In an embodiment of the present invention, the shielding layer furtherincludes a secondary shielding area corresponding to the secondary gap.

In the present invention, a touch display panel including an arraysubstrate, the touch panel disclosed above, and a liquid crystal layeris provided. The touch panel is disposed opposite to the arraysubstrate. The liquid crystal layer is sandwiched between the arraysubstrate and the touch panel.

According to the present invention, the touch panel is equipped withboth the touch function and the color filtering function. Therefore, thetouch panel and the array substrate are assembled, and the liquidcrystal layer fills therebetween, such that the touch display panel isformed. In comparison with the conventional touch display panel formedby adhering the touch panel to the display panel, a thickness of thetouch display panel of the present invention is rather thin.

Moreover, in the touch display panel of the present invention, each ofthe signal lines is electrically connected only to only one of the touchelectrodes, such that the number of the touch electrodes in the panel isdecreased. As such, the unfavorable sensitivity of the touch displaypanel resulting from the excessive parasitic capacitance which isgenerated by the excessive touch electrodes can be prevented.

To make the above and other features and advantages of the presentinvention more comprehensible, several embodiments accompanied withfigures are detailed as follows.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings constituting a part of this specification areincorporated herein to provide a further understanding of the invention.Here, the drawings illustrate embodiments of the invention and, togetherwith the description, serve to explain the principles of the invention.

FIG. 1A is a schematic partial cross-sectional view of a conventionaladded-type touch display panel.

FIG. 1B is a schematic partial cross-sectional view of a conventionalintegrated-type touch display panel.

FIG. 2A is a schematic top view of a touch display panel according to anembodiment of the present invention.

FIG. 2B is a schematic cross-sectional view taken along a line I-I′ inFIG. 2A.

FIG. 2C is a schematic partial cross-sectional view of FIG. 2B.

FIG. 3A is a schematic top view of a touch display panel according toanother embodiment of the present invention.

FIG. 3B is a schematic top view of a touch display panel according tostill another embodiment of the present invention.

FIGS. 4 to 8 are schematic partial cross-sectional views of a touchpanel according to other embodiments of the present invention.

DESCRIPTION OF EMBODIMENTS Touch Display Panel

FIG. 2A is a schematic top view of a touch display panel according to anembodiment of the present invention. FIG. 2B is a schematiccross-sectional view taken along a line I-I′ in FIG. 2A.

Referring to FIG. 2A, the touch display panel 300 includes a displayarea 302 and a non-display area 304. In the present embodiment,electrodes 224 a and 224 b serving as touch electrodes are disposed inthe display area 302. Signals lines 226 a and 226 b are connected to thetouch electrodes 224 a and 224 b, extend from the touch electrodes 224a, 224 b to the non-display area 304, and are electrically connected tocorresponding devices or circuits (not shown). In the presentembodiment, the touch electrodes 224 a are arranged at two oppositesides of the display area 302, and the touch electrodes 224 b arearranged at the bottom side of the display area 302. The bottom sidehaving the touch electrodes 224 b is arranged and connected between thetwo opposite sides having the touch electrodes 224 a. However, thenumber of the touch electrodes 224 a, 224 b and the positions thereof inthe display area 302 are not limited in the present invention. Each ofthe signal lines 226 a is connected to only one of the touch electrodes224 a and extends along a first direction (e.g. horizontal direction).Each of the signal lines 226 b is connected to only one of the touchelectrodes 224 b and extends along a second direction (e.g. verticaldirection). In the present embodiment, the first direction is differentfrom the second direction.

Based on the above, referring to the cross-sectional view shown in FIG.2B, the touch display panel 300 includes an array substrate 310, a touchpanel 200, and a liquid crystal layer 320. The liquid crystal layer 320is sandwiched between the array substrate 310 and the touch panel 200.The array substrate 310 can be an active device array substrate.Besides, the array substrate 310 includes a first substrate 312 and anactive layer 314. The first substrate 312 can be a glass substrate, aplastic substrate, or any other appropriate substrate.

The touch panel 200 in the touch display panel 300 of the presentembodiment is inverted, and a schematic cross-sectional view of theinverted touch panel 200 is depicted in FIG. 2C for the purpose ofelaboration. Referring to FIGS. 2B and 2C together, the touch panel 200can be a color filter substrate having a touch function. Besides, thetouch panel 200 includes a second substrate 210, a touch layer 220, anda color filter layer 230. In the present embodiment, the touch panel 200can further include a planarization layer 240 and an electrode film 250.

The second substrate 210 can be a glass substrate, a plastic substrate,or any other appropriate substrate. Besides, the second substrate 210includes a touch area 212 and a non-touch area 214. In the presentembodiment, the touch area 212 is disposed in a display area 302 of thetouch display panel 300. That is to say, the display area 302 is wherethe touch screen is positioned. Specifically, not only frames or imagescan be displayed on the display area 302, but also words or letters canbe displayed on the display area 302 and directly chosen from orinputted to the display area 302 by a user.

The touch layer 220 includes a shielding layer 222, touch electrodes 224a, 224 b, and signal lines 226 a and 226 b connected to the touchelectrodes 224 a and 224 b respectively. The signal lines 226 a and 226b are illustrated in FIG. 2A. In the present embodiment, the touch layer220 further includes insulating layers 227 and 228.

According to the present embodiment, the shielding layer 222 is disposedon a surface of the second substrate 210 and has a primary shieldingarea 222 a, a plurality of secondary shielding areas 222 b usuallysmaller than the primary shielding area 222 a, and a plurality oftransparent areas 222 c between primary shielding area 222 a andadjacent secondary shielding area 222 b or between the adjacentsecondary shielding areas 222 b, so as to form a lattice-like structure.The shielding layer 222 can be made of a conductive material (e.g.metal) or a non-conductive material (e.g. black resin). The transparentareas 222 c can be openings penetrating the shielding layer 222, and theopenings are filled with the insulating layer 227 which is mostly on theshielding layer 222.

On the other hand, the touch electrodes 224 a, 224 b are disposed abovethe shielding layer 222. A primary gap G1 exists between two adjacenttouch electrodes 224 a, 224 b and corresponds to the primary shieldingarea 222 a. The touch electrodes 224 a, 224 b can be made of atransparent conductive material, such as indium tin oxide (ITO), cadmiumtin oxide (CTO), aluminum zinc oxide (AZO), indium zinc oxide (IZO),zinc oxide (ZnO), tin oxide (SnO), or a combination thereof.

The color filter layer 230 is disposed on the touch layer 220 andincludes a plurality of color filter patterns 232. The color filterpatterns 232 can be red filter patterns, blue filter patterns, or greenfilter patterns. Besides, the color filter patterns 232 are disposedcorresponding to the transparent areas 222 c, and a secondary gap G2exists between every two of the color filter patterns 232 and is usuallysmaller than the primary gap G1, which should not be construed as alimitation to the present invention. In another embodiment, theshielding layer 222 and the color filter layer 230 can be in the samelayer, and the secondary gaps G2 are filled with the secondary shieldingareas 222 b of the shielding layer 222.

On the other hand, an insulating layer 227 is disposed between theshielding layer 222 and the touch electrodes 224 a, 224 b, and aninsulating layer 228 is disposed between the color filter layer 230 andthe touch electrodes 224 a, 224 b. The insulating layers 227 and 228 canbe made of silicon oxide, silicon nitride, or other dielectricmaterials.

Moreover, the planarization layer 240 covers the color filter patterns232, such that the color filter layer 230 can have relatively highplanarity. Additionally, the planarization layer 240 can be made of anorganic insulating material or an inorganic insulating material. Theelectrode film 250 is located on the planarization layer 240 for drivingthe liquid crystal layer 320. Besides, the electrode film 250 can bemade of a transparent conductive material, such as ITO, CTO, AZO, IZO,ZnO, SnO, or a combination thereof.

Optical films including polarizers and brightness enhanced films can befurther disposed on the touch display panel 300. In the aboveembodiment, the touch LCD panel 300 is taken as an example, while thepresent invention should not be construed as limited to the touch LCDpanel 300. According to other embodiments, the touch panel 200 can alsobe assembled to other types of display panels.

The touch electrodes, the signal lines, and the filter patterns areintegrated to form the touch panel according to the present embodiment,such that the touch panel is equipped with both the touch function andthe color filtering function. Therefore, the touch display panel can beformed by merely assembling the touch panel and the array substrate andfilling the liquid crystal layer between the assembled touch panel andarray substrate. Namely, the touch display panel 300 is a display panelwith built-in touch electrodes and built-in signal lines. Hence, incomparison with the conventional added-type touch display panel of whichthe touch panel is adhered to the outside of the display panel, thetouch display panel 300 of the present invention has a reducedthickness.

Further, in comparison with the conventional integrated-type touchdisplay panel, the touch display panel 300 of the present invention canbe formed by performing a rather simplified manufacturing process, andyield of the touch display panel 300 can also be improved. Additionally,in the touch display panel 300, each of the signal lines is merelyconnected to only one of the touch electrodes. For instance, each of thesignal lines 226 a is electrically connected only to the correspondingtouch electrode 224 a but not to other touch electrodes. Note that thesignal lines 226 a are still connected to external signal receivers orother external devices, so as to transmit signals thereto. Each of thesignal lines 226 b is electrically connected only to the correspondingtouch electrode 224 b but not to other touch electrodes. Note that thesignal lines 226 b are still connected to external signal receivers orother external devices, so as to transmit signals thereto. Therefore,since each of the signal lines is merely connected to only single onetouch electrode, the number of the touch electrodes in the panel can bereduced. As such, the unfavorable sensitivity of the touch display panel300 resulting from the excessive parasitic capacitance which isgenerated by the excessive touch electrodes can be prevented.

According to the embodiment depicted in FIGS. 2A to 2C, the touchelectrodes are disposed in the display area. However, the disposition ofthe touch electrodes is not limited to the above according to thepresent invention. The touch electrodes can also be disposed in otherareas according to another embodiment of the present invention asdescribed hereinafter.

In general, the display panel formed by assembling the array substrateand the color filter substrate is frequently equipped with anembellished housing. The housing often covers a portion of the displayarea, and the image display area is an area exposed by the housing. Inthe embodiment depicted in FIG. 3A, the touch electrodes 224 aredisposed in a non-image area 302 a of the display area 320. Namely, thenon-image area 302 a is part of the display area 302 but does not serveto display frames or images. As such, the touch electrodes 224 do notpose an impact on actual image display, and consumers' preferences forlarge-sized display frame can be satisfied.

In addition, the signal lines 226 a and 226 b of the present embodimentdepicted in FIGS. 2A to 2C have different extending directions. However,the different extending directions of the signal lines 226 a and 226 bshould not be construed as a limitation to the present invention. Inanother embodiment of the present invention as illustrated in FIG. 3B,the signal lines 226 a and 226 b in a display panel 300 b have the sameextending direction (e.g. vertical direction).

Moreover, in the above embodiment, the structure of the touch panel 200in the touch display panel 300 is exemplified in FIG. 2C, which shouldnot be construed as limited to the present invention. The structure ofthe touch panel proposed in the present invention can also be referredto the structures depicted in FIGS. 4-8 and described hereinafter.

Touch Panel

Referring to FIG. 4, components of a touch panel 200 a are similar tothose of the touch panel 200 illustrated in FIG. 2B, and therefore thesame components are labeled by the same reference numbers. Touchelectrodes 224 a and 224 b in the touch panel 200 a are disposed indifferent film layers. Therefore, an insulating layer 229 insulating thetouch electrode 224 a from the touch electrode 224 b is disposed betweenthe touch electrodes 224 a and 224 b.

In other words, according to the present embodiment, the touch panel 200a includes a shielding layer 222, an insulating layer 227, the touchelectrode 224 a, the insulating layer 229, the touch electrode 224 b, aninsulating layer 228, a color filter layer 230, a planarization layer240, and an electrode film 250 that are sequentially stacked on a secondsubstrate 210. Here, alternatively, the shielding layer 222 and thecolor filter layer 230 can be positioned in the same layer, which shouldnot be construed as a limitation to the present invention.

In another embodiment of the present invention as shown in FIG. 5,components of a touch panel 200 b are similar to those of the touchpanel 200 illustrated in FIG. 2A, and therefore the same components arelabeled by the same reference numbers. Touch electrodes 224 a′ and 224b′ in the touch panel 200 b are disposed on the second substrate 210,and a primary gap G exists between every two of the adjacent touchelectrodes 224 a′ and 224 b′. Besides, each touch electrode 224 a′ andeach touch electrode 224 b′ have a plurality of transparent areas T anda plurality of non-transparent areas, so as to form a lattice-likestructure. A material of the touch electrodes 224 a′ and 224 b′ can be anon-transparent conductive material, such as tantalum, chromium,molybdenum, titanium, aluminum, and so on. The transparent areas T canbe openings penetrating the touch electrodes 224 a′ and 224 b′, and theopenings can be filled with a transparent conductive material, such asITO, CTO, AZO, IZO, ZnO, SnO, or a combination thereof.

A primary shielding area 222′ of the shielding layer 222 iscorrespondingly disposed above the primary gap G between the touchelectrodes 224 a′ and 224 b. The color filter patterns 232 are locatedabove the primary shielding area 222′ and the touch electrodes 224 a′and 224 b′. Besides, the color filter patterns 232 are arrangedcorresponding to the transparent areas T of the touch electrodes 224 a′and 224 b′. Here, alternatively, the shielding layer 222 can be in thesame layer together with the touch electrode 224 a′, the touch electrode224 b′, or the color filter layer 230, which should not be construed asa limitation to the present invention.

In other words, according to the present embodiment, the touch panel 200b includes the touch electrodes 224 a′ and 224 b′, an insulating layer227, the primary shielding area 222′, an insulating layer 228, the colorfilter layer 230, a planarization layer 240, and an electrode film 250that are sequentially stacked on a second substrate 210.

FIG. 6 is a schematic partial cross-sectional view of a touch panelaccording to a fourth embodiment of the present invention. Components ofthe touch panel 200 c in FIG. 6 are similar to those of the touch panel200 b illustrated in FIG. 5, and therefore the same components arelabeled by the same reference numbers. Touch electrodes 224 a′ and 224b′ in the touch panel 220 c are formed by different film layers.Therefore, an insulating layer 229 insulating the touch electrode 224 a′from the touch electrode 224 b′ is disposed between the touch electrodes224 a′ and 224 b′.

That is to say, according to the present embodiment, the touch panel 200c includes the touch electrode 224 a′, the insulating layer 229, thetouch electrode 224 b′, an insulating layer 227, a primary shieldingarea 222′, an insulating layer 228, a color filter layer 230, aplanarization layer 240, and an electrode film 250 that are sequentiallystacked on a second substrate 210. Here, alternatively, the primaryshielding area 222′ can be in the same layer together with the touchelectrode 224 a′, the touch electrode 224 b′, or the color filter layer230, which should not be construed as a limitation to the presentinvention.

In another embodiment of the present invention as shown in FIG. 7,components of a touch panel 200 d are similar to those of the touchpanel 200 b illustrated in FIG. 5, and therefore the same components arelabeled by the same reference numbers. Touch electrodes 224 a′ and 224b′ in the touch panel 200 d are located between a primary shielding area222′ and a color filter layer 230.

Namely, according to the present embodiment, the touch panel 200 dincludes the primary shielding area 222′, an insulating layer 227, thetouch electrodes 224 a′ and 224 b′, an insulating layer 228, the colorfilter layer 230, a planarization layer 240, and an electrode film 250that are sequentially stacked on a second substrate 210. Here,alternatively, the primary shielding area 222′ can be in the same layertogether with the touch electrode 224 a′, the touch electrode 224 b′, orthe color filter layer 230, which should not be construed as alimitation to the present invention.

In another embodiment of the present invention as shown in FIG. 8,components of a touch panel 200 e are similar to those of the touchpanel 200 d illustrated in FIG. 7, and therefore the same components arelabeled by the same reference numbers. Touch electrodes 224 a′ and 224b′ in the touch panel 220 e are formed by different film layers.Therefore, an insulating layer 229 insulating the touch electrode 224 a′from the touch electrode 224 b′ is disposed between the touch electrodes224 a′ and 224 b′.

Namely, according to the present embodiment, the touch panel 200 eincludes a primary shielding area 222′, an insulating layer 227, thetouch electrode 224 a′, the insulating layer 229, the touch electrode224 b′, an insulating layer 228, a color filter layer 230, aplanarization layer 240, and an electrode film 250 that are sequentiallystacked on a second substrate 210. Here, alternatively, the primaryshielding area 222′ can be in the same layer together with the touchelectrode 224 a′, the touch electrode 224 b′, or the color filter layer230, which should not be construed as a limitation to the presentinvention.

The touch panel respectively illustrated in FIGS. 4 to 8 can beassembled to the array substrate 310 depicted in FIG. 2, and the touchLCD panel can be formed after the liquid crystal layer 320 is filledbetween the assembled touch panel and array substrate 310.

In light of the foregoing, the touch display panel of the presentinvention is a display panel with built-in touch electrodes and built-insignal lines. Therefore, in comparison with the conventional touchdisplay panel formed by adhering the touch panel to the display panel,the touch display panel of the present invention has a reduced thicknessand can be formed by performing a simplified manufacturing process, soas to comply with current market demands on miniature electronicproducts and to increase yield of the touch display panel.

Moreover, in the touch display panel of the present invention, each ofthe signal lines is connected only to only one of the touch electrodes,such that the number of the touch electrodes in the panel is decreased.As such, the unfavorable sensitivity of the touch display panelresulting from the excessive parasitic capacitance which is generated bythe excessive touch electrodes can be prevented.

It will be apparent to those skilled in the art that variousmodifications and variations can be made to the structure of the presentinvention without departing from the scope or spirit of the invention.In view of the foregoing, it is intended that the present inventioncover modifications and variations of this invention provided they fallwithin the scope of the following claims and their equivalents.

1. A touch display panel, comprising: an array substrate; a color filtersubstrate disposed opposite to the array substrate and having a toucharea and a non-touch area, the color filter substrate comprising: ashielding layer having a plurality of transparent areas; a plurality oftouch electrodes disposed in the touch area and above the shieldinglayer; a plurality of signal lines disposed above the shielding layer,each of the signal lines being connected to only one of the touchelectrodes; and a plurality of color filter patterns disposed above thetouch electrodes and corresponding to the transparent areas of theshielding layer; and a liquid crystal layer sandwiched between the arraysubstrate and the color filter substrate.
 2. The touch display panel asclaimed in claim 1, wherein the touch electrodes comprise a plurality offirst touch electrodes and a plurality of second touch electrodes; andthe signal lines comprise a plurality of first signal lines and aplurality of second signal lines, wherein each of the first signal linesis connected to only one of the first touch electrodes and extends alonga first direction, and each of the second signal lines is connected toonly one of the second touch electrodes and extends along a seconddirection different from the first direction.
 3. A touch display panel,comprising: an array substrate; a color filter substrate disposedopposite to the array substrate and having a touch area and a non-toucharea, the color filter substrate comprising: a plurality of touchelectrodes disposed in the touch area, each of the touch electrodeshaving a plurality of transparent areas; a plurality of signal lines,each of the signal lines being connected to only one of the touchelectrodes; a shielding layer disposed corresponding to a gap betweenthe every two adjacent touch electrodes; and a plurality of color filterpatterns disposed above the touch electrodes and the shielding layer,the color filter patterns corresponding to the transparent areas of thetouch electrodes; and a liquid crystal layer sandwiched between thearray substrate and the color filter substrate.
 4. The touch displaypanel as claimed in claim 3, wherein the touch electrodes comprise aplurality of first touch electrodes and a plurality of second touchelectrodes; and the signal lines comprise a plurality of first signallines and a plurality of second signal lines, wherein each of the firstsignal lines is connected to only one of the first touch electrodes andextends along a first direction, and each of the second signal lines isconnected to only one of the second touch electrodes and extends along asecond direction different from the first direction.
 5. A touch panel,comprising: a substrate; a touch layer disposed on the substrate andcomprising a first touch electrode, a first signal line, and a shieldinglayer, the first signal line being electrically connected only to thefirst touch electrode; and a color filter layer disposed on thesubstrate.
 6. The touch panel as claimed in claim 5, wherein the firsttouch electrode has a non-transparent area and a transparent area. 7.The touch panel as claimed in claim 6, wherein the touch layer furthercomprises a first insulating layer disposed between the first touchelectrode and the shielding layer.
 8. The touch panel as claimed inclaim 6, wherein the touch layer further comprises a first insulatinglayer disposed between the first touch electrode and the color filterlayer.
 9. The touch panel as claimed in claim 6, wherein the touch layerfurther comprises a first insulating layer disposed between theshielding layer and the color filter layer.
 10. The touch panel asclaimed in claim 5, wherein the touch layer further comprises a secondtouch electrode and a second signal line, and the second signal line iselectrically connected only to the second touch electrode.
 11. The touchpanel as claimed in claim 10, wherein the second touch electrode has anon-transparent area and a transparent area.
 12. The touch panel asclaimed in claim 11, wherein the touch layer further comprises a secondinsulating layer disposed between the second touch electrode and thefirst touch electrode.
 13. The touch panel as claimed in claim 11,wherein the touch layer further comprises a second insulating layerdisposed between the second touch electrode and the shielding layer. 14.The touch panel as claimed in claim 11, wherein the touch layer furthercomprises a second insulating layer disposed between the second touchelectrode and the color filter layer.
 15. The touch panel as claimed inclaim 10, wherein the first signal line is parallel to the second signalline.
 16. The touch panel as claimed in claim 10, wherein a primary gapexists between the first touch electrode and the second touch electrode.17. The touch panel as claimed in claim 16, wherein the shielding layercomprises a primary shielding area corresponding to the primary gap. 18.The touch panel as claimed in claim 17, wherein the color filter layercomprises a plurality of color filter patterns, and a secondary gapexists between every two of the color filter patterns.
 19. The touchpanel as claimed in claim 18, wherein the shielding layer furthercomprises a secondary shielding area corresponding to the secondary gap.20. The touch panel as claimed in claim 5, the shielding layer can be inthe same layer together with the first touch electrode.
 21. The touchpanel as claimed in claim 10, the shielding layer can be in the samelayer together with the second touch electrode.
 22. A touch displaypanel, comprising: an array substrate; a touch panel as claimed in claim5 disposed opposite to the array substrate; and a liquid crystal layer,sandwiched between the array substrate and the touch panel.